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 #include &quot;informationwindow.h&quot;
 #include &quot;imageitem.h&quot;
 #include &quot;view.h&quot;

 View::View(const QString &amp;offices, const QString &amp;images, QWidget *parent)
     : QGraphicsView(parent)
 {
     officeTable = new QSqlRelationalTableModel(this);
     officeTable-&gt;setTable(offices);
     officeTable-&gt;setRelation(1, QSqlRelation(images, &quot;locationid&quot;, &quot;file&quot;));
     officeTable-&gt;select();

     scene = new QGraphicsScene(this);
     scene-&gt;setSceneRect(0, 0, 465, 615);
     setScene(scene);

     addItems();

     QGraphicsPixmapItem *logo = scene-&gt;addPixmap(QPixmap(&quot;:/logo.png&quot;));
     logo-&gt;setPos(30, 515);

     setMinimumSize(470, 620);
     setMaximumSize(470, 620);
     setWindowTitle(tr(&quot;Trolltech World Wide&quot;));
 }

 void View::addItems()
 {
     int officeCount = officeTable-&gt;rowCount();

     int imageOffset = 150;
     int leftMargin = 70;
     int topMargin = 40;

     for (int i = 0; i &lt; officeCount; i++) {
         ImageItem *image;
         QGraphicsTextItem *label;
         QSqlRecord record = officeTable-&gt;record(i);

         int id = record.value(&quot;id&quot;).toInt();
         QString file = record.value(&quot;file&quot;).toString();
         QString location = record.value(&quot;location&quot;).toString();

         int columnOffset = ((i / 3) * 37);
         int x = ((i / 3) * imageOffset) + leftMargin + columnOffset;
         int y = ((i % 3) * imageOffset) + topMargin;

         image = new ImageItem(id, QPixmap(&quot;:/&quot; + file));
         image-&gt;setData(0, i);
         image-&gt;setPos(x, y);
         scene-&gt;addItem(image);

         label = scene-&gt;addText(location);
         QPointF labelOffset((150 - label-&gt;boundingRect().width()) / 2, 120.0);
         label-&gt;setPos(QPointF(x, y) + labelOffset);
     }
 }

 void View::mouseReleaseEvent(QMouseEvent *event)
 {
     if (QGraphicsItem *item = itemAt(event-&gt;pos())) {
         if (ImageItem *image = qgraphicsitem_cast&lt;ImageItem *&gt;(item))
             showInformation(image);
     }
     QGraphicsView::mouseReleaseEvent(event);
 }

 void View::showInformation(ImageItem *image)
 {
     int id = image-&gt;id();
     if (id &lt; 0 || id &gt;= officeTable-&gt;rowCount())
         return;

     InformationWindow *window = findWindow(id);
     if (window &amp;&amp; window-&gt;isVisible()) {
         window-&gt;raise();
         window-&gt;activateWindow();
     } else if (window &amp;&amp; !window-&gt;isVisible()) {
         window-&gt;show();
     } else {
         InformationWindow *window;
         window = new InformationWindow(id, officeTable, this);

         connect(window, SIGNAL(imageChanged(int, QString)),
                 this, SLOT(updateImage(int, QString)));

         window-&gt;move(pos() + QPoint(20, 40));
         window-&gt;show();
         informationWindows.append(window);
     }
 }

 void View::updateImage(int id, const QString &amp;fileName)
 {
     QList&lt;QGraphicsItem *&gt; items = scene-&gt;items();

     while(!items.empty()) {
         QGraphicsItem *item = items.takeFirst();

         if (ImageItem *image = qgraphicsitem_cast&lt;ImageItem *&gt;(item)) {
             if (image-&gt;id() == id){
                 image-&gt;setPixmap(QPixmap(&quot;:/&quot; +fileName));
                 image-&gt;adjust();
                 break;
             }
         }
     }
 }

 InformationWindow* View::findWindow(int id)
 {
     QList&lt;InformationWindow*&gt;::iterator i, beginning, end;

     beginning = informationWindows.begin();
     end = informationWindows.end();

     for (i = beginning; i != end; ++i) {
         InformationWindow *window = (*i);
         if (window &amp;&amp; (window-&gt;id() == id))
             return window;
     }
     return 0;
 }</pre>
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